var Map = function() {
    this._entrys = new Array();
    
    this.put = function(key, value) {
        if (key == null || key == undefined) {
            return;
        }
        var index = this._getIndex(key);
        if (index == -1) {
            var entry = new Object();
            entry.key = key;
            entry.value = value;
            this._entrys[this._entrys.length] = entry;
        } else {
            this._entrys[index].value = value;
        }
    };
    this.get = function(key) {
        var index = this._getIndex(key);
        return (index != -1) ? this._entrys[index].value : null;
    };
    this.remove = function(key) {
        var index = this._getIndex(key);
        if (index != -1) {
            this._entrys.splice(index, 1);
        }
    };
    this.clear = function() {
        this._entrys.length = 0;
        ;
    };
    this.contains = function(key) {
        var index = this._getIndex(key);
        return (index != -1) ? true : false;
    };
    this.getCount = function() {
        return this._entrys.length;
    };
    this.getEntrys = function() {
        return this._entrys;
    };
    this._getIndex = function(key) {
        if (key == null || key == undefined) {
            return -1;
        }
        var _length = this._entrys.length;
        for (var i = 0; i < _length; i++) {
            var entry = this._entrys[i];
            if (entry == null || entry == undefined) {
                continue;
            }
            if (entry.key === key) { //equal 
                return i;
            }
        }
        return -1;
    };
    this._toString = function() {
        var string = "";
        for (var i = 0; i < this.getEntrys().length; i++) {
            string += this.getEntrys()[i].key + ":" + this.getEntrys()[i].value;
            if (i != this.getEntrys().length - 1) {
                string += ",";
            }
        }
        return string;
    };
    this._toJson=function()
    {
        var result ="{";
        for (var i = 0; i < this.getEntrys().length; i++) {
            result +="'"+this.getEntrys()[i].key + "':'" + this.getEntrys()[i].value+"'";
            if (i != this.getEntrys().length - 1) {
                result += ",";
            }
            else
             {
                result+="}";
             }   
        }
        return result;
    }
};